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chromium/third_party/blink/web_tests/paint/invalidation/box/shadow-box-resize-expected.html 

<!DOCTYPE html>
<style>
body {
    margin: 0;
}
div {
    position: absolute;
    width: 100px;
    height: 100px;
    background-color: green;
    box-shadow: 40px 20px black;
}
#target1 {
    top: 100px;
    left: 100px;
    width: 150px;
}
#target2 {
    top: 100px;
    left: 300px;
    width: 50px;
}
#target3 {
    top: 300px;
    left: 100px;
    height: 150px;
}
#target4 {
    top: 300px;
    left: 300px;
    height: 50px;
}
</style>
<div id="target1"></div>
<div id="target2"></div>
<div id="target3"></div>
<div id="target4"></div>